There's no investigative journalism by Mike Wallace here. Instead, he straight-forwardedly narrates the story of the Columbia River, mentioning Canada but with an absence of footage from the above the 49th.
No music augments the film except at the start and finish.
Scenes are well shot. It's a shame this print is so splicy,
I must have dozed off as there was a line about a ferry and no bridge. There has been a traffic bridge connecting Oregon and Washington since at least the '20s.
The copyright date for the film (though not on this print) is July 12, 1947.

I cringed whenever they talked about salmon--how the ladders would enable the fish to zip right past the dams, how the salmon canneries were the major industry of the region. Not any more, the dams have wiped out the salmon runs. Especially poignant were the Indians fishing at Celilo Falls.

Another color film from Coronet's later period, when it tried to get out of the shadow of just being a Social Guidance film maker and make more EB quality films. In this case, we have a focus on the Columbia river, which is a good exploration on the many paths the river takes. Although EB quality (No music and somewhat dull) it does has some nice cinematography and is a curio in the Coronet pantheon.